Spindle carrier locking mechanism



Feb. 24, 1942. A. E. DRxssNER 2,273,844

SPINDLE CARRIER LOCKING MECHANISM Filed June l2l, 1959 3 Sheets-Sheet l Feb. 24, 1942. A. E. DRls'sNl-:R

SPINDLE CARRIER LOCKING MECHANISM Filed June 21, 1939 3 Sheets-Sheet 2 www j A41.

' lNvENToR. ecZE Drvtsneva 1 ATTORNEY.

Feb. 24, 1942. A. E. DRlssNER 2,273,844'

SPINDLE CARRIER LOCKING MECHANISM Filed June 21, 1959 asheets-sheet s Qdi. T-

``/ ATTURNEY Patented Feb. 24, 1942 y 2,273,844 sempre can-nien LOCKING MECHANISM Alfred E. Drissner, Cleveland,

` The National Acme Company,

va corporation of 'Ohio Application .lune 2l, 1939, Serial No. ,280,314

l2 Claims.

This invention relates to spindle carrier locking mechanism :for multiple spindle machines, the object of the Vinvention being to provide an improved locking mechanism which will -rmly secure the indexible spindle carrier imposition in its head stock and prevent any movement or looseness thereof while the tools are cutting on the work Yor stock rods carried by the rotary spindles of the carrier but which locking mechanism, when released, will permit the carrier to be freely indexed.

-leretofore, in multiple spindle machines, it has been the practice to lock the carrier by means of a 'locking bolt or pin held in locking position by spring pressure which, however, was not always' efficient to lock the carrier and prevent possibility of its moving annularly when heavy tool .cuts were being made, especially on the larger 'sizes of machines whereas, the present improved locking mechanism will prevent any annular land longitudinal movement of the indexible spindle carrier in its head stock during heavy drilling or other main tool slide operations on the work since the carrier is eiiectively clamped in its headstock.

yIt has been the practice tolock `the carrier against longitudinal movement by a locking nut operating in the front wall of the gear boX section but during heavy main tool slide cuts, especially on `larger machines, the tendency was to iiex this wall so that the carrier would move to the extent oi this flexing. The present improvement obviates this disadvantage and `provides a more efficient locking mechanism which may be used in conjunction withthe well-known locking bolt mechanism although it may be used independently thereof if desired.

In the drawings accompanying and forming a part of this specification,

Fig. 1 is a top view of the locking mechanism operating means, particularly illustrating the cam for operating it.

Fig. 2? is a -sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a side View of Fig. 2.

Fig. 4 is a detail view of this improved locking mechanism and its operating means.

Fig. 5 is a detail view thereof.

Fig. 6 is a similar detail view.

Fig. 7 is a sectional view of the cross slide operating mechanism shown in my copending application Serial Number 274,127, filed May 17, 1939, now Letters Patent 2,187,683 of January 16,

Ohio, assignor 'to Cleveland, Ohio,

by `means of vwhich this locking Imechanism is controlled, and

Fig. 8 vis a View of this top cam shaft illus- -trating the cams which control the locking mechanism.

Similar characters `of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and its mode of operation, I desire to have it understood that the invention is not limited Vto the details oi construction `and arrangement of parts illustrated in the accompanying drawings since the invention is capable of other embodiments, and that the phraseology employed is for the purpose of description and not of limitation.

The inflexible spindle carrier A, mounted in the usual way in the machine, is locked and released for indexing by a pair of shoes 2 and 3 cooperating with 'the upper face thereof and these shoes are shifted into and out of engagement vwith the carrier thereby to lock it against movement and release it for indeXible movement by suitable operating means which, in the present instance, is controlled by a cam drum 4 having suitable cams 5 and i?, mounted on the cam shaft 'l (see Fig. 8).

These cams 5 and 6 control the movement of a lever 8 having a roller 9 cooperating with the cams and this lever is mounted on a shaft I0 supported in suitable `bushings li. To the shaft is also `attached a lever I2 which cooperates with a spring i3 controlling its upward movement and a toggle operating bar lli. This spring may be readily adjusted by suitable nuts i5 to obtain the proper locking tension and to compensate for wear.

A toggle i6 comprising a pair of toggle links carried by the bar I4 shifts a pair of toggle link connected blocks and thereby the shoes 2 and 3, one of these link connected blocks engaging and shifting the shoe 3 (see Figs. 2 `and 4) and the other link connected block engaging a member or block mounted on the end of a reciprocating connecting rod I1, thereby to shift the rod and thus drawing the shoes into engagement with the indexible spindle carrier and so locking it. The shoes are connected together by the reciprocating rod l1 on which the shoes are mounted. Suitable nuts I8 at the ends of this rod adjust the wear on the shoes. The movement of the lever l2 against the action of its spring releases the toggle and thereby the shoes.

Thus, by means of `this toggle, the shoe 3 is 1940, and which also operates the top cam shaft iirmly pressed into engagement with the indexible spindle carrier and, at the same time, the shoe 2 is drawn into a similar engagement, effectively locking the spindle carrier against movement during the cutting operation of the tools upon the Work and which locking effect is obtained when one set of cams of the cam shaft 1 shifts the lever 8in one direction and released When the cams of the shaft shift the lever in the opposite direction.

It is to be understood that, by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond the terms of the several claims or the requirements of the prior art.

Having thus explained the nature of my said invention and described a Way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the modes of its use, I claim:

1. A locking mechanism for an indexible spindle carrier comprising a pair of oppositely moving shoes engaging the peripheral surface of said carrier, toggle means for operating said shoes, spring pressed means for controlling the movement of said toggle means, a lever for controlling said spring pressed means, a cam shaft, and cams carried thereby for controlling the movement of said last lever in opposite directions.

2. A locking mechanism for an indexible spindle carrier comprising a pair of oppositely moving shoes engaging the peripheral surface of said carrier, toggle means for operating said shoes, spring pressed means for controlling the movement of said toggle means, a lever for controlling said spring pressed means, a cam shaft, cams carried thereby for controlling the movement of said last lever in opposite directions, and means for adjusting the tension of said spring pressed means.

3. A locking mechanism for an indexible spindle carrier comprising a pair of oppositely moving shoes engaging the peripheral surface of said carrier, toggle means for operating said shoes, spring pressed means for controlling the movement of said toggle means, a lever for controlling said spring pressed means, a cam shaft, cams carried thereby for controlling the movement of said last lever in opposite directions, and means for adjusting said shoes.

4. A locking mechanism for an adjustable spindle carrier comprising a pair of oppositely moving shoes engaging the peripheral surface of said carrier, toggle means for operating said shoes, spring pressed means for controlling the movement of said toggle means, a lever for controlling said spring pressed means, a cam shaft, cams carried thereby for controlling the movement of said last lever in opposite directions,

`means for adjusting the tension of said spring pressed means, and means for adjusting said shoes.

.5. A locking mechanism for an indexible spindle carrier comprising one or more shiftable shoes having a curvilinear surface corresponding to a similar surface of the carrier, and means for operating said locking mechanism and comprising toggle mechanism directly engaging and operating a shoe, a spring controlled lever, and cams for operating said lever.

6. A locking mechanism for an indexible spindle carrier comprising a pair of shiftable shoes movable relative to each other in opposite directions, and operating means therefor comprising toggle mechanism, a spring controlled lever for operating said toggle mechanism, and a cam controlled lever for controlling said last lever.

7. A locking mechanism for an indexible spindle carrier comprising a pair of shiftable shoes movable toward and from each other, a reciprocating rod for said shoes, and a toggle mechanism for shifting said rod and shoes.

8. A locking mechanism for an indexible spindle carrier comprising a pair of shiftable shoes movable toward and from each other, a reciprocating rod for said shoes, a toggle mechanism for shifting said rod and shoes, and cam actuated means for operating said toggle mechanism.

9. A locking mechanism for an indexible spindle carrier comprising a pair of shiftable shoes movable toward and from each other for engaging the peripheral surface of said carrier, a reciprocating rod carrying said shoes, toggle means for shifting said rod and shoes, a spring cooperating with said toggle means, a lever for operating said toggle means, and cam actuated means for controlling the movement of said last lever.

10. A locking mechanism for an indexible spindle carrier comprising a shiftable shoe having a curvilinear surface corresponding to a similar surface of the carrier, and operating means therefor comprising toggle means located directly to engage and operate the shoe in the same direction as the thrust of the toggle means.

11. A locking mechanism for an indexible spindle carrier comprising a pair of shiftable shoes movable toward each other to engage the carrier, and operating means therefor comprising toggle means located directly to engage and shift one of said shoes and simultaneously shift the other of said shoes both toward each other to lock the carrier.

12. A locking mechanism for an indexible spindle carrier comprising one or more shiftable shoes having a curvilinear surface corresponding to a similar surface of the carrier, and means for operating said locking mechanism and comprising toggle mechanism comprising a pair of toggle link connected blocks, one directly operating one shoe, a reciprocating rod connecting said shoes and shifted by the other of said link connected blocks, a spring controlled lever, and cams for operating said lever.

ALFRED E. DRISSNER. 

